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Trisomy 21. Down syndrome (also known by the karyotype 47,XX,+21 for females and 47,XY,+21 for males) [98] is mostly caused by a failure of the 21st chromosome to separate during egg or sperm development, known as nondisjunction. [91] As a result, a sperm or egg cell is produced with an extra copy of chromosome 21; this cell thus has 24 ...
The U.S. para badminton duo of Jayci Simon and Miles Krajewski earned a silver medal in mixed doubles SH6 at the Paralympics in Paris.
Mandela during his 1994 visit to the US Recorded on 4 October 1994. Nelson Rolihlahla Mandela (/ mænˈdɛlə / man-DEH-lə; [ 1 ]Xhosa: [xolíɬaɬa mandɛ̂ːla]; born Rolihlahla Mandela; 18 July 1918 – 5 December 2013) was a South African anti-apartheid activist, politician, and statesman who served as the first president of South Africa ...
A mobile operating system is an operating system used for smartphones, tablets, smartwatches, smartglasses, or other non-laptop personal mobile computing devices.While computers such as typical/mobile laptops are "mobile", the operating systems used on them are usually not considered mobile, as they were originally designed for desktop computers that historically did not have or need specific ...
George Washington (February 22, 1732 – December 14, 1799) was an American Founding Father, politician, military officer, and farmer who served as the first president of the United States from 1789 to 1797. Appointed by the Second Continental Congress as commander of the Continental Army in 1775, Washington led Patriot forces to victory in the ...
Yusuf Islam (born Steven Demetre Georgiou; 21 July 1948), [1] commonly known by his stage names Cat Stevens, Yusuf, and Yusuf / Cat Stevens, is a British singer-songwriter and musician. He has sold more than 100 million records and has more than two billion streams. [2] His musical style consists of folk, rock, pop, and, later in his career ...
Renault Master. The Renault Master is a large van produced by the French manufacturer Renault since 1980, now in its third generation. It replaced the earlier Renault Super Goélette light trucks. [ 1 ] Opel has sold versions of the second and third series vans as the Opel Movano in Continental Europe and Vauxhall Movano in the United Kingdom.